Cold water weighs more than hot water.
93
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Nearly 50% of the world's scientists are assigned to military projects.
71
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Pumice is the only rock that floats on water.
14